libtensorflowlite_c.dll issue about tf-lite-unity-sample

[SBeyer6]

Ok I checked, it seemed like the latest vc 2019 redistributable was installed.

[SBeyer6]

@vaibhav-suri I managed to fix this error by installing both the x86 and x64 Visual C++ 2019 Redistributable.
Hope this works for you as well.

[asus4]

@Cipher-zzz
I haven't tried building it. But I think you can cross-compile it by adding build options in bazel.
https://www.tensorflow.org/lite/guide/build_arm

To build a dll for Windows, please refer to the build script build_tflite.py

tf-lite-unity-sample/build_tflite.py

Lines 50 to 54 in 0060d49

	def build_windows(enable_xnnpack = False):
	# Main
	option_xnnpack = 'true' if enable_xnnpack else 'false'
	run_cmd(f'bazel build -c opt --define tflite_with_xnnpack={option_xnnpack} tensorflow/lite/c:tensorflowlite_c')
	copy('bazel-bin/tensorflow/lite/c/tensorflowlite_c.dll', 'Windows/libtensorflowlite_c.dll')

[Cipher-zzz]

@siri-sinthawat I am temporarily working on another project, haven't tried it yet. I will comment here if there is any update.

[asus4]

Hmm, it seems to be a dependency error. but I couldn't reproduce it. Are there any other error messages? Can you share the UnityEditor's log?

[cyraxchel]

Hello.
I got this same dependency issue. I decided to rebuild the tflite libraries myself. Prepared the build environment ... and after that the message about dependencies in Unity disappeared.

[asus4]

@cyraxchel Thanks for your report. Just to clarify, Did the error disappear before you built the library yourself?

[cyraxchel]

@cyraxchel Thanks for your report. Just to clarify, Did the error disappear before you built the library yourself?

I failed rebuild library (some error in VC). I keep using your library. :)

UPD: win 10, Unity: 2019.1.6f1 and Unity 2019.4.8f1

[SBeyer6]

I seem to get this issue as well; It works on two different PCs but on another PC it the plugin fails to load, with the same error.

[asus4]

Could you check which dependencies are missing using app like this?
https://kb.froglogic.com/misc/using-dependency-walker/

[cwule]

Trying to build for Windows 10 UWP Arm64 application leads to the same error:
Exception thrown at 0x00007FFDF75539EC in tf-lite-unity-sample.exe: Microsoft C++ exception: Il2CppExceptionWrapper at memory location 0x0000009FF8CFCA60. DllNotFoundException: Unable to load DLL 'libtensorflowlite_c': The specified module could not be found. at TensorFlowLite.InterpreterOptions.TfLiteInterpreterOptionsCreate () [0x00000] in <00000000000000000000000000000000>:0 at TensorFlowLite.InterpreterOptions..ctor () [0x00000] in <00000000000000000000000000000000>:0 at TensorFlowLite.BaseImagePredictor1[T]..ctor (System.String modelPath, System.Boolean useGPU) [0x00000] in <00000000000000000000000000000000>:0 at TensorFlowLite.PoseNet..ctor (System.String modelPath) [0x00000] in <00000000000000000000000000000000>:0 at PoseNetSample.Start () [0x00000] in <00000000000000000000000000000000>:0

Would be great to add support for UWP Arm64 as well (needed for Hololens 2 development).

[vaibhav-suri]

Plugins: Failed to load 'V:/HandTracking/tflite/tf-lite-unity-sample-master/Packages/com.github.asus4.tflite/Plugins/Windows/libtensorflowlite_c.dll' because one or more of its dependencies could not be loaded.

Getting this error,any idea how to fix?

[vaibhav-suri]

@SBeyer6 Thanks a lot! That worked.

[Cipher-zzz]

@cwule got the same error when developing Hololens 2 App, did you solve that issue? Or if there is any idea to approach. Thanks in advance.

[cyraxchel]

@cwule got the same error when developing Hololens 2 App, did you solve that issue? Or if there is any idea to approach. Thanks in advance.

Please, check corerct version VC installed. When I install VS 2019, it fix error. Before was VS 2017.. Sorry, I don't remember, which versions on both Visual Studio on.

[Cipher-zzz]

@cyraxchel Thanks for your response. I have tried both VS 2019 and VS 2022, with VC 2019 redistributable installed, same error:

DllNotFoundException: Unable to load DLL 'libtensorflowlite_c': The specified module could not be found.
  at TensorFlowLite.InterpreterOptions.TfLiteInterpreterOptionsCreate () [0x00000] in <00000000000000000000000000000000>:0 
  at TensorFlowLite.InterpreterOptions..ctor () [0x00000] in <00000000000000000000000000000000>:0 
  at TensorFlowLite.BaseImagePredictor`1[T]..ctor (System.String modelPath, System.Boolean useGPU) [0x00000] in <00000000000000000000000000000000>:0 
  at TensorFlowLite.SSD..ctor (System.String modelPath) [0x00000] in <00000000000000000000000000000000>:0 
  at SsdSample.Start () [0x00000] in <00000000000000000000000000000000>:0 

I think the reason for this error could be different from the one in the origin post. I checked the DLL file 'libtensorflowlite_c' in Unity, it seems only support x86 and x64. However, I am building the project into HoloLens 2 which is ARM64, which should be the reason why this happened.

I don't have much experience in Unity development, I am not sure what does that DLL file is for and how to make it support ARM64 devices. I will appreciate that if you can give me some ideas. @asus4

[Cipher-zzz]

@asus4 Thank you! I will have a try.

[siri-sinthawat]

@Cipher-zzz The same error is happening to me. Can it be fixed?

[fatlinlin]

the same error happen on my mac pro

[asus4]

Did you pull Git LFS files? All libs are in Git LFS.